This 3.5x35 ACOG scope provides a dual-illuminated reticle using fiber optics and tritium for a bright aiming point in any light condition. The ranging reticle is calibrated for M193 ammunition (5.56, 55gr FMJ, common military surplus) fired from a 16" barrel. The chevron reticle is designed to be zeroed using the tip at 100 meters and the BDC goes out to 800 meters. The width of the chevron at the base is 5.5 MOA which represents 19” at 300 meters. This allows range estimation for silhouette targets. Trijicon 3.5x35 ACOG Red Chevron M193 100291